Angle hole digger



July 11, 1950 R. c. BENSON ANGLE HOLE DIGGER 3 Sheets-Sheet 1 Filed July 21, 1947 bl N. D A U mu m U w h mm m k% U @A U as 3 aw mm m 5 m& mm 09 mm \R Q m8 6 a w: 2 \Q\ 9+ g 3 km mm QR INVENTOR. R0567"? C56 7750 77 ATTD RN EYS R. C. BENSON ANGLE HOLE DIGGER July 11, 1950 5 Sheets-Sheet 2 Filed July 21, 1947 mm %w m R ms 2 mm Wm m mm Q\ mm INVENTOR ATTD R N EYS July 11, 1950 R. c. BENSON ANGLE HOLE DIGGER Filed July 21, 1947 3 Sheets-Sheet 3 INVENTOR. 2 06678 63677.9077

ATTU RN EYS Patented July 11, i950 UNITED STATES PATENT. op cs g}; 2,514,832-

v a i I ANGLE HOLE BIGGER Robert 0. Benson, Kirksvi lle, Mo. Application July 21, 1947; Serial No. 762,30Sl a,

, This invention relates to an angle hole digger which is adapted to be mounted on a power unit of a tractor or' a truck and will bore a vertical hole regardless of the position of the truck or tractor with relation to the ground and regardger will always bore a vertical hole.

Withthe above and other objects and advantages in view, the invention consists of the novel detailsof construction, arrangement and combination of parts more fully hereinafter described,

claimed and illustrated in the accompanying drawings in which! jacks, tools or other simip Figure l is an elevational view of an embodiment of the invention; shown mounted on the powerunit;

Figure 2 is a front elevational view thereof;

"Figure'3 is a sectional view'on the line 33 of Figure 2; i

' Figure 4 is a sectional view on the line 4p4 of Figure 2;

Figure 5 is a sectional view on the line 55 of Figure 3; i

Figu're 6 is asectional View on the line 66 of Figure 5; Y

Figure 7 is a sectional view on the line 11 of Figure 1; a,

Figure 8 is a plan view of the carrier boom;

Figure 9 is a detailed sectional view of one end of the torque bar and Figure 10 is a sectional view on the line l0l0 of Figure 8.

Referring more in detail to the drawings, and more particularly to Figure 1, a fragmentary showing'of the rear end of a tractor is designated bythe reference numeral 20, while the angle hole digger embodying the invention is generally designated by the reference numeral 2 I.

As seen in Figure'8 the carrier boom 22 of the digger'comprises a frame 23 having side members shaft 21 on which is mounted the sieeve '28. The sleeve has horizontally disposed apertured'ears 29 secured thereto intermediate of the portions 24 which, are attached or connected to the draw bar 3i] of the tractor by removable pins 3|. Centrally -of the sleeve 28,1there is" provided a downwardly inclined apertured ear32, the purposeof which is t'obe later described.

Formed on each of the portions in vertical relation thereto, are the apertured ears 33 which carry the axle 34 of the drum 35, on which'is wound the'cable136 in triangular formation, so the free ends of the cable 36 which are provided with loops 3! may be secured to the hooks 38 which are secured to the rear of the tractor 20 in opposed parallel relation to each other.

The axle 34. of the drum carries a ratchet 39 which engages withj the dog 40 mounted by the pin M in the apertured ears 42 of the bracket43 secured to the'frame23, and acoil springi l sleeved on the nut 45 on the dog and engaging the bracket 43 urgesxthe dog into engagement with the ratchet so that when the crank 46 on the aiile 34:is rotatedto wind the cable 36 on the drum, the dog 40: willv prevent unwinding of the cable untilthe dog is disengaged from the ratchet.

The plate 26 carries the eye l! which engages the eye 48 which is fixed on the U-shaped digger frame 49centrally of theU bend thereof; The frame '49 has the rearwardly extending plates 50 secured, to the lower ends thereof, and

"The opposite ends of the portions 24 carry a 65 these platesc'arry the shaft 5| on which is sleeved the tubular member 52 which is secured to the lower end of the tubular section 53 of the torque bar at right angles thereto. The angle plates 55 reinforce the connection to prevent breakage th'ereofb j Therod 5,6 of the torque bar 54 is telesco'pically mounted in the tubular section 53, and is threaded at one jend to receive the bushing 5! which provides perfect alinement of the rodand tubular section. The forward end of the section carriesthe bushing :58 whichbeing sleeved on the rod' 56 performs the same operation as the bush ing 51. v v H The rear end of the rod 56 is provided with a yoke 5 9 whichis connected to the ear 32 on the sleeve 28 bythe' removablepin 60. Thus the boom zz and fram e 4e and torque bar 54 will movefasj a uniton the shaft 2'lwhenthe cable 35' is wound on the'drurn 3'5.

Slifably mounted on the opposite sides time frame '45 are the sleeves 5 l which carry the I gear; boil '6'2having theremovable" plate 63 secured' 52 also carriesthe box I4 for the roller bearing 15 which is also sleeved on the shaft 64, and a collar I6 secured to the shaft 64 by the tapered pin 11 retains the roller bearing 15 in the box I4. The shaft I is journalled by the roller bearings I8 carried by the boxes I9 and 80 respectively, which are secured to the box 62 inwardly thereof.

The shaft I0 is connected to the universal joint 8| by the tapered'pin 82, and the joint 8| is secured to the tubular section 83 of the power take-off connector shaft 84. The rod 85-of the shaft 84: is' telescopically received in the section 83, and connected at its rear end to the universal joint 86 which is connected to the power take-off shaft 0T. Fixed rotation of the rod 85 and section 83 is accomplished by engaging of the projecting pin 88 on the inner wall of the section 83 engaging the longitudinal slot 89 formed in the rod 85. The pin 88 permits sliding motion of the section 83an'd rod 85, butcau'ses the two to rotate as a unit.

Sleeved 'on-theshaft 64,, above the box 62,are the upper and lower bushings 891and 90 respectively of the drum 9i, which is provided on its upper surface witha friction ring. i 12.v A collar'93 keyed to the shaft 64'at 941s provided'with the lower flange 95 carrying thefri'ction ring 9'8 in opposed relation to the ring 92.. Thus a friction clutch arrangement is provided for the collar 93and drum 9|; The collar is provided with the central annular groove 91 for. engagement with the yoke 98 whichby a tapered-pin 99 is secured to the shaft I00 journalled in the apertured ears IOI which are secured to the frame I08" to the sleeve 6| in opposed relation on the; frame 49; to sleeve BI- on which the pulley I03 is mounted.

On the shaft I00, there is fixed by the tapered pin I-06the-clutch operated control arm I 05, having the opening I0I at its lower end, to which the control cable I08 is attached. A spring I0-9 sleeved on the nut I09" on the arm. I and engagingthe bracket IIO on the sleeve 61 urges the control arm I05 inwardly to disengage the friction rings. Therefore, a pull on the cable I08 will move the arm I05 outwardly to cause engagement of the friction rings for a purpose to be later described.

Secured to the frame 49 adjacent the bend thereof,'is a bracket I II having opposed apertured ears I I2 for the pin I I3, on which the latching dog H4 is mounted. A spring 5 sleeved on the nut H6 on the dog engages the bracket I I I, and urges the lower end of the dog inwardly. The lower end of the dog H4 is hooked to engage the shaft I00, so that the dog will'retain the sleeves. in elevated position on the. frame '49.

The hooked end of the dog II4 overlies the projection I I! on the arm I05.

In use with the boom mounted on the rear of the tractor, as previously described, and the shaft 84 mounted as shown in Figure 1, the device is ready for operation. When it is to be moved. from one location to another, the crank 48 is rotated, swinging the digger outwardly out of engagement with the ground. At the digging locatio n the cable 36 is permitted to unwind until the auger is digging position.

By pulling on the cable I08, the arm I05 will be moved outwardly to permit the auger to move downwardly by means of the sleeves GI sliding on-the'frame 49. The power take-01f is caused to rotate theauger and the hole is bored.

The telescoping bar 54 permits the auger to swing backward a'nd forward so that by reason of its own weight, it will lie in a vertical plane, since the eye connection of the frame with the boom will permit thedigger to move sideways as desired. The fram'e' permits the take-off shaft to swing sidewaysfa'sthe digger swingssideways.

When the. hole is bored and it is desired to raise the augenthecable I08 is pulled until the friction'rings'92 and d6 are. engaged, causing the drum dI to rotatefari'd'wind the cable I98 thereon. Since oneend of the "cable is fixed to one of the sleeves fi lonthefrarne 99, the cable willc'a'use the'auge'r' to riseby the sleeves BI sliding upwardly on thejfframel 49. The tractor can be m'ov'ecl'afte'r theh'ooked" end of the dog engages the shaft I 08 and the procedure repeated to permit another liole' to'fbe dug. 7

There has. thus" been provided a post hole. digge'r whicli, actinglike'a'plllmb bob wilfalw'ays lie in a vertical plane; due to its. own weight, so

thata' vertical hole'can be dug, regardless of the position of the tractor" or truck. on which it is mounted; v

Itis believed that from the. foregoing description, theopleration and construction of the digger willbe apparent tothose skilled. in the art, andit to be understood that changesin the minor'details'of construction, arrangement and combination of, parts may be resorted to, provided they fall withi'nft'he spirit of the invention and thescope of the app'endedclairn.

Having thus described the invention, what is claimedas new and desired to be secured by Letters Paterrt is I v p A post hole digger of the character described in. combination with a power take-off unitof a tractor, comprising a boom pivotally connected;

to. said-tractor -a substantially: U shaped frame loosely supported by said boom at the top-thereof, I

a telescoping-torque. barconnected at one'end to the-bottonrof satd framir andatritst other end to the tractor whereby the framewill; by 'it'so'wn' gearmeanson-saiid gear-box, means connectingsaidr'au'gerto said" gear means and means. connected: to; said? gear means and said'power take off for the rotation of said: auger; a reel mounted on said boom having arope'wound thereon and having its free end'connected tosaid'tractor, handlemeans mounted-err said 'reelz'whereby upon operatiorhof: said-handle meansisaid reel is rotated and-"saidropefwillr-furthenwind: up-

thereon 13341158 vertical-"lifting: of: the U-frame,

a second reel carried-by-saidggear "box, a second rope wound on said second reel, trained over pulleys mounted: on one of. said sleeves and on said U-frame respectively and fixed at its free end to said frame, clutch means mounted on said second reel, means operably connecting said clutch means to the gear means within said gear box, clutch shifting means mounted on said 5 gear box, whereby upon engagement of said clutch means said second reel is rotated to wind up said second rope thereon and cause said auger to be raised and upon release of said clutch means said second rope is allowed to unwind from said 10 second reel to allow said auger to be lowered.

ROBERT C. BENSON.

REFERENCES CITED The following references are of record in the 15 file of this patent:

Number 6 UNITED STATES PATENTS Name Date Davis Dec. 14, 1897 Roberts Sept. 23, 1913 Jones July 9, 1918 Gibson Oct. 5, 1926 Shinn Apr. 23, 1935 Hollingsworth May 25, 1937 Gaty July 5, 1938 Houston June 15, 1943 Lamme Nov. 5, 1946 Dobbs Nov. 9, 1948 Adams Apr. 26, 1949 McCardell July 5, 1949 

